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Mapping lineaments using Landsat 8 OLI and SRTM data;a case study of the eastern part of the Ouarzazate Basin,Morocco

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Journal of Mountain Science 2024年第3期21卷 987-1003页

作者： MOUJANE Said algouti Ahmed algouti abdellah FARAH Abdelouahed ABOULFARAJ Abdelfatah NAFOURI Imane Geoscience Geotourism Natural Hazards and Remote Sensing Laboratory(2GRNT) Department of GeologyFaculty of Sciences SemlaliaUniversity of Cadi AyyadBP 239040000MarrakechMorocco

The integration of remote sensing and geographic information system(GIS)was employed in this study to delineate the structural lineaments within the eastern section of the Ouarzazate Basin,situated between the southern front of the Central High Atlas and the northern slopes of the Eastern Anti-Atlas(also known as the Saghro Massif).To achieve this objective,Landsat 8 Operational Land Imager(OLI)and Shuttle Radar Topography Mission(SRTM)data were *** Component Analysis(PCA)was computed and a directional filter was applied to the first PCA and the panchromatic band(B8).Additionally,shading was applied to the SRTM data in four directions;N0°,N45°,N90°,N135°.After removing of the non-geological linear structures,the results obtained,using the automatic extraction method,allowed us to produce a synthetic map that included 1251 lineaments with an average length of 1331 m and was dominated by NE-SW,ENE-WSW and E-W directions,***,the high lineament density is clearly noted in the Anti-Atlas(Saghro Massif)and at the level of the northern part,extending from the Ait Ibrirne to Arg-Ali Oubourk *** lineament density can always be found around the major faults affecting this *** data collected during the field investigations and from geological maps show that the major direction of the faults and structural accidents range mostly between N45°,N70°and N75°.The correlation of remote sensing results with those collected in the field shows a similarity and coincidence with each *** these results,it is possible to consider the automatic extraction method as a supplementary kind that can serve classical geology by quickly enriching it with additional *** shown in this work,this method provides more information when applied in arid areas where the fields are well outcropped.

关键词： Remote sensing GIS Landsat 8 OLI SRTM Ouarzazate Basin Central High Atlas

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Natural Risk Management of the Catchment Area of the R' Dat River:Approaches by Sig

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地学前缘 2009年第S1期16卷 56-56页

作者： Ghizlane El Berkaoui algouti abdellah Azzaoui Kheir Eddine Faculty of Science Semlalia Marrakech University Cadi Ayyad Department of Geology Faculty of Science Semlalia Marrakech

In the High Atlas soil erosion constitutes a serious problem which leads to destruction of agricultural land and to the supply of important solid load to *** process contributes to harmful floods and to significant silting of *** management of the basins slopes is a priority in order to reduce damage related to *** the studied area,a significant part of the geological formations are

关键词： High Atlas of Marrakech R’ Dat River natural risks

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The Beni Bousera Peridotite(Rif Belt, Morocco): A Subsolidus Evolution Interpretation

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Acta Geologica Sinica(English Edition) 2016年第S1期90卷 111-页

作者： MOURABIT Zahra TABIT Abdelhalim algouti Ahmed algouti abdellah University of Cadi Ayyad Faculty of Science Semlalia Laboratory: Geology of Sedimentary Moroccan BasinsDepartment of Geology

The Beni Bousera ultramafic massif is a tectonically emplaced body of upper mantle material that is exposed over 72 km2at the base of the internal zones of the Alpine Rif belt of northern *** predominant lithology in

关键词： The Beni Bousera Peridotite A Subsolidus Evolution Interpretation Morocco Rif Belt

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Thermal and Friction Effects on Mixed Mode Delamination

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Journal of Harbin Institute of Technology(New series) 2024年

作者： abdellah Benchekkour Nazihe Terfaya Mohammed Elmir Barhm Abdullah Mohamad ENERGARID Laboratory， Tahri Mohammed University FIMAS Laboratory， Tahri Mohammed University L2ME Laboratory， Tahri Mohammed University Department of Petroleum Technology， Koya Technical Institute， Erbil Polytechnic University

A comprehensive numerical investigation into mixed-mode delamination is presented in this study. It aims to assess the impact of thermal and friction effects through mixed-mode flexure crack propagation testing. Finite element analysis was employed to model the delamination process， incorporating a contact cohesive zone model. This model couples the traction-separation law， the contact law， and the Coulomb friction law simultaneously. The thermomechanical analysis in this study is performed using a sequentially coupled approach， implemented with the finite element software ABAQUS. The findings underscore the importance of this study.

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Fluctuating Asymmetry of Elopes lacerta (Valenciennes, 1847) Otoliths in the Western African Waters

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Open Journal of Marine Science 2024年第3期14卷 41-62页

作者： Madel Floriane Adjibayo Houeto Marwa Mejri Malek Tazarki Marius Sounouvou Nicolas Andrialovanirina Meriem Ben Ghorbel Pierre Dossou-Yovo abdellah Chalh Pierre Quignard Monia Trabelsi Kélig Mahé Laboratory of Ecology Biology and Physiology of Aquatic Organisms Faculty of Sciences of Tunis University of Tunis El Manar Tunis Tunisia Institute of Mathematics and Physical Sciences University of Abomey-Calavi (UAC) Abomey-Calavi Benin IFREMER Unit HMMN Halieutic Resources Laboratory Boulogne-sur-Mer France Laboratory for Research into the Processing and Conservation of Fishery Products (LAREPROH) University of Abomey-Calavi (UAC) Abomey-Calavi Benin Unit of Population Genetics and Biological Resources Faculty of Sciences of Tunis University of Tunis El Manar Tunis Tunisia Laboratoire dIchtyologie Universit Montpellier Montpellier France

The importance of this study lies in the in-depth exploration of the ecological diversity of otoliths in Elopes lacerta, based on the analysis of data from 260 individuals collected from various sites, including the Porto Novo lagoon, the Cotonou lagoon, Lake Nokou, and the Atlantic coast in southern Benin. The results highlight significant variations in otolith morphology, establishing relevant links with the biological parameters of the fish at each site. Exploration of the asymmetry between the right and left sides reveals notable distinctions between these two aspects. Analysis of otolith shape thus emerges as a valuable tool for discriminating between stocks and providing a better understanding of ecological variations. The local diversity observed highlights the crucial importance of implementing adaptive management strategies to ensure effective conservation of the species and its habitat.

关键词： Analysis Porto-Novo Lagoon Cotonou Lagoon Lake Nokoué Coast Atlantic

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Serviceability analysis of deep underground openings driven in jointed-rock

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International Journal of Mining Science and Technology 2017年第6期27卷 1019-1024页

作者： abdellah Wael R. Mining and Metallurgical Engineering Department Faculty of Engineering University of Assiut Assiut 71515 Egypt

The performance of underground excavations is inevitably influenced by rock mass characteristics, presence of joints and their geometrical properties, depth below surface and state of in-situ stress field. The objective of this paper is to investigate the behaviour of deep underground tunnel opening existed between two bedding planes, Such planes weaken the strength of rock mass and may cause rock slippage/rotation along them. Therefore, the state of stress-displacement, after tunnel opening has been introduced, is examined using two-dimensional elasto-plastic finite-elements code, RS^(2D). The results indicate that, there is significant drop in the normal stress along joints over tunnel opening; slip occurs due to reversal in the direction of shear stress(e.g., inward shear displacement is produced) and there is discontinuity in the strength contours of rock surrounding tunnel after they have been intersected by bedding planes.

关键词： State of stress-displacement Bedding planes Tunnel performance Depth of failure zones Stability analysis

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Numerical study of the performance of multistage Scaba 6SRGT impellers for the agitation of yield stress fluids in cylindrical tanks

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Journal of Hydrodynamics 2015年第3期27卷 436-442页

作者： AMEUR Houari BOUZIT Mohamed GHENAIM abdellah Laboratoire de Mécanique Appliquée Faculté de Génie MécaniqueUSTO-MB Institut de Technologie Université Ibn Khaldoun INSA de Strasbourg-24 Bd de la Victoire-67084 Strasbourg-France

The 3-D flow fields and power consumption in a vessel stirred by multistage Scaba 6SRGT impeller have been investiga- ted. The Xanthan gum solutions in water were used, which have a shear thinning behavior with yield stress. This study was carried out with the help of a CFD package （CFX 13.0, Ansys Inc.） which is based on the finite volume method to solve the momentum equations. The effects of stirring rate, fluid rheology, impeller number, impeller location and vessel size on the performance of such stirred system are presented. To validate the CFD model, our predicted results have been compared with other literature data and a satisfactory agreement has been found.

关键词： Scaba 6SRGT impeller multistage agitator yield stress fluid stirred tank power consumption

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Delay-dependent Stabilization Conditions of Controlled Positive Continuous-time Systems

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International Journal of Automation and computing 2014年第6期11卷 653-660页

作者： Wafa Elloumi abdellah Benzaouia Mohamed Chaabane Lab-STA National School of Engineering of Sfax University of Sfax PB 1173 3038 Sfax Tunisia LAEPT URAC 28 University Cadi Ayyad Faculty of Science Semlalia BP 2390 Marrakech Morocco

The stabilization problem for a class of linear continuous-time systems with time-varying non differentiable delay is solved while imposing positivity in closed-loop. In particular, the synthesis of state-feedback controllers is studied by giving sufficient conditions in terms of linear matrix inequalities(LMIs). The obtained results are then extended to systems with non positive delay matrix by applying a memory controller. The effectiveness of the proposed method is shown by using numerical examples.

关键词： Positive systems delay systems stabilization linear matrix inequalities (LMIs) time-varying delay non differentiable delay

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A NEW SELF-ADAPTIVE ITERATIVE METHOD FOR GENERAL MIXED QUASI VARIATIONAL INEQUALITIES

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Acta Mathematica Scientia 2008年第3期28卷 685-696页

作者： abdellah Bnouhachem Mohamed Khalfaoui Hafida Benazza School of Management Science and Engineering Nanjing University Ecole Supérieure de Technologie de Salé Mohamed 5 University of Science Agdal-RabatMorocco

The general mixed quasi variational inequality containing a nonlinear term φ is a useful and an important generalization of variational inequalities. The projection method can not be applied to solve this problem due to the presence of nonlinear term. It is well known that the variational inequalities involving the nonlinear term φ are equivalent to the fixed point problems and resolvent equations. In this article, the authors use these alternative equivalent formulations to suggest and analyze a new self-adaptive iterative method for solving general mixed quasi variational inequalities. Global convergence of the new method is proved. An example is given to illustrate the efficiency of the proposed method.

关键词： General mixed quasi variational inequalities self-adaptive rules resolvent operator

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Fabrication of Microporous Membranes from Melt Extruded Polypropylene Precursor Films via Stretching: Effect of Annealing

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Chinese Journal of Polymer Science 2015年第7期33卷 1028-1037页

作者： Shan Wang Amir Saffar abdellah Ajji Hong Wu 郭少云 The State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Research Center for High performance Polymer and Composite Systems (CREPEC) Chemical Engineering DepartmentPolytechnique MontrealP.O. Box 6079Montreal Quebec H3C 3A7 Canada

In this work, the effects of annealing conditions on the microstructure of polypropylene（PP） precursor films and further on the porous structure and permeability of stretched membranes were investigated. Combinations of WAXD, FTIR, DSC and DMA results clearly showed the crystalline orientation and crystallinity of the precursor film increased with annealing temperature, while the molecular chain entanglements in the amorphous phase decreased. Changes in the deformation behavior suggested more lamellar separation occurred for the films annealed at higher temperatures. Surface morphologies of the membranes examined by SEM revealed more pore number and uniform porous structure as the annealing temperature increased. In accordance with the SEM results, the permeability of the membranes increased with annealing temperature. On the other hand, it was found that 10 min was almost enough for the annealing process to obtain the microporous membranes with an optimal permeability.

关键词： Annealing Microporous membrane Polypropylene Crystalline orientation Deformation behavior

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